Support Snap.

https://github.com/lpereira/hardinfo/issues?q=is%3Aissue+snap returns 0 results.

My rationale is available at https://github.com/safing/portmaster-packaging/issues/45#issue-961633238:~:text=packages%20for%20snap%20are%20able%20to%20be%20distributed%20without%20necessitating%20containerization.

